*{box-sizing:border-box}
html{scroll-behavior:smooth}
:root{
  --bg:#090b12;
  --bg2:#111522;
  --card:#f5f6f8;
  --paper:#ffffff;
  --ink:#101522;
  --muted:#647084;
  --line:#dfe4ee;
  --blue:#4b74ff;
  --navy:#111827;
  --shadow:0 30px 90px rgba(8,12,22,.18);
  --radius:34px;
  --container:1280px;
}
html,body{margin:0;padding:0}
body{
  font-family:Inter,"PingFang SC","Microsoft YaHei",Arial,sans-serif;
  background:#eef1f6;
  color:var(--ink);
  line-height:1.75;
}
a{text-decoration:none;color:inherit}
img{display:block;max-width:100%;height:auto}
button{font:inherit}
.container{width:min(var(--container),calc(100% - 32px));margin:0 auto}
.label{
  display:inline-flex;align-items:center;gap:10px;
  font-size:12px;font-weight:900;letter-spacing:.16em;text-transform:uppercase;color:var(--blue);
}
.label:before{content:"";width:28px;height:2px;background:linear-gradient(90deg,var(--blue),transparent);border-radius:999px}
h1,h2,h3,p{margin:0}
p{color:var(--muted)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 22px;border-radius:999px;border:1px solid transparent;font-weight:900;cursor:pointer;
  transition:.22s ease;
}
.btn:hover{transform:translateY(-1px)}
.btn-dark{background:#111827;color:#fff;box-shadow:0 18px 42px rgba(17,24,39,.18)}
.btn-light{background:#fff;color:#111827;border-color:var(--line);box-shadow:0 16px 36px rgba(12,18,31,.08)}
.btn-outline{background:transparent;color:#111827;border-color:rgba(17,24,39,.18)}

.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(238,241,246,.86);backdrop-filter:blur(16px);
  border-bottom:1px solid rgba(17,24,39,.06);
}
.nav-wrap{min-height:82px;display:flex;align-items:center;gap:18px;position:relative}
.brand{display:flex;align-items:center;gap:14px;min-width:max-content}
.brand-mark{
  width:48px;height:48px;border-radius:18px;display:grid;place-items:center;
  background:linear-gradient(135deg,#090b12,#4b74ff);
  color:#fff;font-size:24px;font-weight:900;
}
.brand span:not(.brand-mark){display:flex;flex-direction:column;gap:2px}
.brand strong{font-size:18px;line-height:1}
.brand em{font-size:12px;color:#778296;font-style:normal;letter-spacing:.12em}
.main-nav{display:flex;align-items:center;gap:18px;margin-left:auto}
.main-nav a,.nav-button{border:0;background:transparent;padding:0;color:#111827;font-size:14px;font-weight:800;cursor:pointer}
.nav-actions{display:flex;gap:10px}
.nav-toggle{display:none;border:0;background:transparent;margin-left:auto;padding:0;cursor:pointer}
.nav-toggle span{display:block;width:24px;height:2px;background:#111827;margin:5px 0;border-radius:99px}

/* Hero */
.hero{
  background:linear-gradient(180deg,#eef1f6 0%,#e8edf5 100%);
  padding:34px 0 30px;
}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;align-items:stretch}
.hero-copy{
  padding:40px;border-radius:42px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);
}
.hero-copy h1{font-size:clamp(52px,6vw,96px);line-height:.9;letter-spacing:-.065em;margin:18px 0}
.hero-copy p{font-size:17px;max-width:720px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.hero-stat{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:32px}
.hero-stat article{background:#f5f6f8;border:1px solid var(--line);border-radius:24px;padding:18px}
.hero-stat strong{display:block;font-size:30px;line-height:1}
.hero-stat span{display:block;margin-top:8px;color:var(--muted);font-size:14px}

.hero-stage{
  position:relative;min-height:620px;border-radius:42px;overflow:hidden;
  background:radial-gradient(circle at center,#f7f8fb 0%,#dbe3f2 72%);
  border:1px solid var(--line);box-shadow:var(--shadow);
}
.stage-back{
  position:absolute;inset:80px;border-radius:50%;
  border:1px solid rgba(75,116,255,.16);
}
.stage-back:before,.stage-back:after{content:"";position:absolute;inset:70px;border-radius:50%;border:1px solid rgba(17,24,39,.08)}
.stage-back:after{inset:140px}
.stage-product{
  position:absolute;display:flex;align-items:center;justify-content:center;
  background:rgba(255,255,255,.70);border:1px solid rgba(17,24,39,.08);border-radius:28px;
  box-shadow:0 20px 50px rgba(11,19,36,.12);
}
.stage-product img{object-fit:contain;filter:drop-shadow(0 24px 32px rgba(14,24,44,.18))}
.main-product{left:50%;top:50%;transform:translate(-50%,-50%);width:340px;height:420px;z-index:3}
.main-product img{max-height:380px}
.product-flex{left:35px;bottom:48px;width:180px;height:190px;z-index:4}
.product-flex img{max-height:150px}
.product-x{right:36px;top:48px;width:190px;height:200px;z-index:4}
.product-x img{max-height:150px}
.product-s{right:54px;bottom:60px;width:170px;height:180px;z-index:4}
.product-s img{max-height:130px}
.stage-note{
  position:absolute;z-index:5;padding:9px 13px;border-radius:99px;background:#111827;color:#fff;font-size:13px;font-weight:900;
}
.note-1{left:44px;top:48px}.note-2{right:250px;bottom:74px}.note-3{left:260px;bottom:110px}

/* Sections */
.entry,.products,.compare,.download,.security,.support,.faq{padding:38px 0}
.section-head{max-width:800px;margin:0 0 24px}
.section-head.center{text-align:center;margin-inline:auto}
.section-head h2,.download-copy h2,.security-copy h2,.support-copy h2,.site-footer h2,.modal-card h2{
  margin:14px 0 12px;font-size:clamp(40px,5vw,72px);line-height:.94;letter-spacing:-.055em;
}
.entry-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.entry-card{
  text-align:left;border:0;cursor:pointer;display:flex;flex-direction:column;justify-content:space-between;
  min-height:270px;background:#fff;border:1px solid var(--line);border-radius:32px;padding:28px;box-shadow:var(--shadow);
}
.entry-card b,.download-steps b{
  display:grid;place-items:center;width:50px;height:50px;border-radius:16px;background:#edf1ff;color:#294fff;font-weight:900;
}
.entry-card h3,.download-steps h3,.security-list h3,.contact-panel h3,.compact-copy h3{margin:18px 0 10px;font-size:30px;line-height:1;letter-spacing:-.04em}
.entry-card strong{color:#111827;word-break:break-word;margin-top:18px}

.product-feature{
  display:grid;grid-template-columns:.95fr 1.05fr;gap:18px;margin-top:16px;align-items:center;
}
.product-feature.reverse{grid-template-columns:1.05fr .95fr}
.product-feature.reverse .product-copy{order:2}
.product-feature.reverse .product-image{order:1}
.product-copy,.product-image,.compact-card,.compare-wrap,.download-copy,.security-copy,.support-copy,.contact-panel,.faq-card{
  background:#fff;border:1px solid var(--line);border-radius:34px;box-shadow:var(--shadow);
}
.product-copy{padding:32px}
.product-copy h3{font-size:clamp(42px,5vw,70px);line-height:.95;letter-spacing:-.06em;margin:14px 0 12px}
.product-image{min-height:360px;padding:28px;display:flex;align-items:center;justify-content:center;background:linear-gradient(180deg,#fff,#eef2f9)}
.product-image img{max-height:280px;object-fit:contain;filter:drop-shadow(0 24px 32px rgba(14,24,44,.16))}
.chips,.support-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.chips span,.support-tags span{padding:9px 12px;border-radius:99px;background:#f5f6f8;border:1px solid var(--line);font-size:13px;font-weight:800}
.compact-products{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:16px}
.compact-card{overflow:hidden}
.compact-image{min-height:230px;padding:24px;background:linear-gradient(180deg,#fff,#eef2f9);display:flex;align-items:center;justify-content:center;border-bottom:1px solid var(--line)}
.compact-image img{max-height:170px;object-fit:contain;filter:drop-shadow(0 20px 28px rgba(14,24,44,.16))}
.compact-copy{padding:24px}

.compare-wrap{padding:28px}
.compare-table{overflow:hidden;border:1px solid var(--line);border-radius:24px}
.compare-row{display:grid;grid-template-columns:1.2fr .9fr 1.2fr 1fr 1fr .65fr;gap:14px;align-items:center;padding:18px 20px;border-top:1px solid var(--line)}
.compare-row.head{border-top:0;background:#edf1ff;font-weight:900}
.mini-btn{border:0;border-radius:99px;padding:9px 12px;background:#edf1ff;color:#294fff;font-weight:900;cursor:pointer}

.download-grid,.security-grid,.support-wrap{display:grid;grid-template-columns:.95fr 1.05fr;gap:18px}
.download-copy,.security-copy,.support-copy{padding:32px}
.download-steps,.security-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.download-steps article,.security-list article{
  background:#fff;border:1px solid var(--line);border-radius:30px;padding:24px;box-shadow:var(--shadow);
}
.support-tags{margin-top:18px}
.contact-panel{padding:28px;text-align:center}
.contact-qr{width:min(320px,100%);margin:0 auto 20px;padding:14px;border-radius:28px;border:1px solid var(--line);background:#f7f8fb}

.faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.faq-card{padding:22px 24px}
.faq-card summary{list-style:none;font-size:18px;font-weight:900;cursor:pointer}
.faq-card summary::-webkit-details-marker{display:none}
.faq-card p{margin-top:10px}

.site-footer{background:#090b12;color:#fff;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:1fr .8fr;gap:24px;padding:38px 0}
.site-footer p{color:#b8c0d0;max-width:680px}
.footer-links{display:flex;flex-direction:column;gap:10px;align-items:flex-end}
.footer-contact{border:1px solid rgba(255,255,255,.18);background:transparent;color:#fff;border-radius:99px;padding:12px 18px;cursor:pointer;font-weight:900}

.contact-modal{display:none;position:fixed;inset:0;z-index:140;align-items:center;justify-content:center}
.contact-modal.open{display:flex}
.modal-mask{position:absolute;inset:0;background:rgba(9,11,18,.7);backdrop-filter:blur(10px)}
.modal-card{position:relative;z-index:2;background:#fff;width:min(460px,calc(100% - 24px));border-radius:34px;padding:30px;text-align:center;box-shadow:var(--shadow)}
.modal-close{position:absolute;top:10px;right:14px;border:0;background:transparent;font-size:30px;cursor:pointer}
.modal-qr{width:min(300px,100%);margin:18px auto;padding:14px;border:1px solid var(--line);border-radius:24px;background:#f7f8fb}
.modal-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:18px}
.float-contact{position:fixed;right:18px;bottom:18px;z-index:120;border:0;border-radius:99px;background:#111827;color:#fff;padding:14px 18px;font-weight:900;cursor:pointer;box-shadow:0 18px 44px rgba(17,24,39,.25)}
body.lock{overflow:hidden}

.reveal{opacity:0;transform:translateY(20px);transition:opacity .65s ease,transform .65s ease}
.reveal.visible{opacity:1;transform:none}

@media(max-width:1180px){
  .main-nav,.nav-actions{display:none}
  .nav-toggle{display:block}
  .nav-wrap.open .main-nav{display:flex;position:absolute;top:76px;left:0;right:0;flex-direction:column;gap:0;background:#fff;border:1px solid var(--line);border-radius:24px;padding:10px;box-shadow:var(--shadow)}
  .nav-wrap.open .main-nav a,.nav-wrap.open .nav-button{padding:12px 14px;text-align:left}
  .nav-wrap.open .nav-actions{display:flex;position:absolute;top:410px;left:0;right:0;background:#fff;border:1px solid var(--line);border-radius:24px;padding:12px;box-shadow:var(--shadow)}
  .hero-grid,.product-feature,.product-feature.reverse,.download-grid,.security-grid,.support-wrap,.footer-grid{grid-template-columns:1fr}
  .product-feature.reverse .product-copy,.product-feature.reverse .product-image{order:initial}
  .entry-grid{grid-template-columns:repeat(2,1fr)}
  .footer-links{align-items:flex-start}
}
@media(max-width:760px){
  .container{width:min(var(--container),calc(100% - 22px))}
  .hero-copy,.entry-card,.product-copy,.compare-wrap,.download-copy,.security-copy,.support-copy,.contact-panel{padding:22px}
  .hero-actions,.modal-actions,.nav-wrap.open .nav-actions{flex-direction:column}
  .hero-stat,.entry-grid,.compact-products,.download-steps,.security-list,.faq-grid,.compare-row{grid-template-columns:1fr}
  .compare-row.head{display:none}
  .compare-table{border:0}
  .compare-row{background:#fff;border:1px solid var(--line);border-radius:22px;margin-bottom:12px}
  .hero-stage{min-height:460px}
  .main-product{width:260px;height:330px}
  .main-product img{max-height:290px}
  .product-flex,.product-x,.product-s,.stage-note,.stage-back{display:none}
  .btn{width:100%}
  .footer-links,.footer-contact{width:100%;align-items:stretch;text-align:center}
}